NL64921C - - Google Patents
Info
- Publication number
- NL64921C NL64921C NL64921DA NL64921C NL 64921 C NL64921 C NL 64921C NL 64921D A NL64921D A NL 64921DA NL 64921 C NL64921 C NL 64921C
- Authority
- NL
- Netherlands
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/58—Anti-side-tone circuits
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/02—Details
- H04B3/40—Artificial lines; Networks simulating a line of certain length
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/738—Interface circuits for coupling substations to external telephone lines
- H04M1/76—Compensating for differences in line impedance
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Thermistors And Varistors (AREA)
- Telephone Function (AREA)
- Monitoring And Testing Of Exchanges (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US463184A US2387269A (en) | 1942-10-24 | 1942-10-24 | Telephone system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL64921C true NL64921C (US07714131-20100511-C00038.png) |
Family
ID=23839177
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL64921D NL64921C (US07714131-20100511-C00038.png) | 1942-10-24 |
Country Status (6)
Families Citing this family (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2518178A (en) * | 1947-11-05 | 1950-08-08 | Automatic Elect Lab | Antisidetone and line balancing substation circuits for telephone systems |
| US2732436A (en) * | 1947-12-22 | 1956-01-24 | Frequency in cycles per second | |
| US2568150A (en) * | 1948-06-15 | 1951-09-18 | Bell Telephone Labor Inc | Balancing network for subscribers' telephone sets |
| US2604543A (en) * | 1950-11-09 | 1952-07-22 | Bell Telephone Labor Inc | Equalizer circuit |
| NL82970C (US07714131-20100511-C00038.png) * | 1950-12-27 | |||
| DE886766C (de) * | 1951-03-03 | 1953-08-17 | Normalzeit G M B H | Einrichtung zur Verhinderung des unerlaubten Abhoerens von Telephongespraechen |
| BE510745A (US07714131-20100511-C00038.png) * | 1951-04-18 | |||
| DE1039104B (de) * | 1951-04-18 | 1958-09-18 | Int Standard Electric Corp | Schaltungsanordnung fuer Fernsprech-stationen zur Verhinderung des Mithoerens der eigenen Sprache |
| DE1038118B (de) * | 1951-04-26 | 1958-09-04 | Int Standard Electric Corp | Schaltungsanordnung fuer Fernsprechstationen zur Verhinderung des Mithoerens der eigenen Sprache und von Raumgeraeuschen |
| BE539848A (US07714131-20100511-C00038.png) * | 1954-07-16 | |||
| US3119063A (en) * | 1961-01-13 | 1964-01-21 | Gen Dynamics Corp | Transmission line terminating impedance distinguishing circuit |
| DE1928434A1 (de) * | 1969-06-04 | 1970-12-10 | Siemens Ag | Schaltungsanordnung zum Anschluss von Gleichstrom-Datenuebertragungssystemen mit niedriger Sendespannung an eine Datenvermittlung |
| NL7805416A (nl) * | 1978-05-19 | 1979-11-21 | Philips Nv | Zelf-instellende vorkschakeling. |
| US6146056A (en) * | 1998-01-14 | 2000-11-14 | Jennmar Corporation | Channel and bearing plate assembly |
-
0
- NL NL64921D patent/NL64921C/xx active
- BE BE468046D patent/BE468046A/xx unknown
-
1942
- 1942-10-24 US US463184A patent/US2387269A/en not_active Expired - Lifetime
-
1944
- 1944-06-02 GB GB10687/44A patent/GB591495A/en not_active Expired
-
1947
- 1947-01-30 FR FR941331D patent/FR941331A/fr not_active Expired
- 1947-03-18 ES ES0177484A patent/ES177484A1/es not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| ES177484A1 (es) | 1947-05-01 |
| BE468046A (US07714131-20100511-C00038.png) | |
| FR941331A (fr) | 1949-01-07 |
| GB591495A (en) | 1947-08-20 |
| US2387269A (en) | 1945-10-23 |
